Injector



(Model.) W. B. MACK.

INJBGTOR. No. 439,356.v Patented Oct. 28, 1890.

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UNITED STATES PATENT OFFICE.

WILLIAM B. MACK, OF EAST OSTON, MASSACHUSETTS.

INJECTOR.

,SPECIFICATION forming part of Letters Patent No. 439,356, dated October 28, 1890. Application filed August 10, 1889. Serial No. 320,341. (Model.)

To all whom it may concern:

Be it known that I, WILLIAM B. MACK, of East Boston, in the county of Suffolk and State of Massachusetts, have invented certain expansion and contraction at the point where they are connected with each other is prevented andthe operation of applying the combining-cone to the injector is sim plitied.

To these ends the invention consists in the combination, with the other operative parts of the injector, of a delivery-cone and a combining-cone fitted to be engaged with each other without a positive or screw-thread connection, the combining-conehaving a reduced unthreaded cylindrical end or boss and the delivery-cone an unthreaded socket formed to receive said end, so that independent expansion or contraction of either ot' said cones can take place without strain on the other or on the connection between them, the end of the combining-cone being adapted to slide in the socket of the delivery-cone.

The casing or shell of the injector is provided with a seat or shoulder at the larger or receiving end of the combining-cone, and said cone has an outwardly-proj ectin g flange which bears on said seat, the latter supporting the receiving end of the combining-cone.

The invention also consists in certain improvements in the construction of that part of the shell or casing that incloses the combining-cone, said shell being contracted around the combining-cone to reduce the size ot' the water-space surrounding said cone, and provided with an annular enlargement surrounding the overow-orices between the combining and delivery cones, said enlargement affording a channel of sufficient size for the passage of the overiiow-water to the overflowoutlet.

In the accompanying drawings, forming a part of this specification, Figure l represents a longitudinal section of an injector provided with my improvements. Figs. 2 and 3 represent side views respectively of the combining-cone and the delivery-cone. Fig. 4: represents a longitudinal section of an injector of slightly different pattern, having my improvements so far as the same relate to the combining and delivery cones.

In the drawings, ct represents the combining-cone, b the delivery-cone, and c the shell or casing. These and the other operative parts of the injector are arranged, as usual, with relation to each other, and the injector operates in the usual manner. The combining-cone is provided at its smaller end with a cylindrical boss a', extending from a shoulder 2 to the end of said cone, said boss presenting a smooth periphery, which takes the place of the screw-thread usually formed on the combining-cone at this point. The delivery-cone is provided with a socket b', having a smooth internal surface formed to receive and fit closely upon the boss a', said smooth-surfaced socket taking the place of the internal screw-thread usually formed in the deliverycone. It will be seen, therefore, that when the boss of the combining-cone is inserted in the socket of the delivery-cone the engagement of said cones with each other is not positive, but is such that either can move independently of the other by expansion and contraction. Hence there is no strain on either part or on the connection between the parts by the independent expansion or contraction of either or by the expansion and contraction of the casing, the smooth boss and socket constituting a slip-joint, which makes the cones independent of each other so far as eX- pansion and contraction are concerned. The delivery-cone is threaded at 3 and screwed into the end coupling or fitting et of the injector inthe usual manner.

5 5 are the usual overflow-openings in the delivery-cone.

The combining-cone is provided at its larger end with an outwardly-projecting flange 6, which rest-s on a seat or shoulder 7, formed on the interior of the casing c, there being no positive connection between said casing and the combining-cone, so that the latter can be easily inserted in and removed from the casing. The portion 8 of the casing that surrounds the overtiow-openings 5 of the delivery-cone is made of the usual diameter, but the portion 9 of the casing that surrounds the combining-cone is contracted, so that the IOO space between the casing and the exterior of the combining-cone is much narrower than usual and can therefore contain comparatively little Water.

An advantage of the contracted casing is that there is less liability of injury to the casing by freezing of water surrounding the combining-cone than there would be if the entire casing were made of the usual internal diameter. The enlarged portion 8 of the casing constitutes an annular channel for the passage of the overtioW-oritice to the Waste or outlet nozzle.

In Fig. 4 I have shown an injector of slight- 1y dierent pattern, having the saine operative parts, but Without the contracted casing.

I claim- 1. The combination, Withv the casing and other operative parts of an injector, said casing having an internal seat or shoulder 7, of the combining-cone having at its larger end a flange formed to bear on said seat and at its inner end an Unthreaded cylindrical boss, and

the delivery-cone positively secured to the casing and having an unthreaded socket formed to receive said boss, as set fort-h.

:2. In an injector, the combination, with the casing having an internal seat or shoulder 7, of the combining-cone having at its larger end a flange formed to bear on said seat and at its inner end an nnthreaded cylindrical boss, the delivery-cone having at one end an unthreaded socket formed to receive said boss, its other end being provided with a screwthread,'and the end coupling or fitting having its inner end engaging said threaded end of the delivery-cone and secured fast to said casing, as set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing Witnesses, this 22d day of July, A. D. 1889.

WILLIAM B. MACK.

I'Vitnesses:

A. D. HARRISON, ARTHUR W. CRossLEY. 

